== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:28:23 (1772468903)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.04623 s, 17.3 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff945a86588000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.899316
Iter 1/10: OSS cache speed: 0.883613
Iter 1/10: ladvise speed: 1.17021
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.902142
Iter 2/10: OSS cache speed: 0.84727
Iter 2/10: ladvise speed: 0.676264
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.509828
Iter 3/10: OSS cache speed: 0.562851
Iter 3/10: ladvise speed: 0.28669
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.374383
Iter 4/10: OSS cache speed: 0.316983
Iter 4/10: ladvise speed: 0.296868
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.320435
Iter 5/10: OSS cache speed: 0.323639
Iter 5/10: ladvise speed: 0.32154
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.275187
Iter 6/10: OSS cache speed: 0.316592
Iter 6/10: ladvise speed: 0.284502
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.362659
Iter 7/10: OSS cache speed: 0.401624
Iter 7/10: ladvise speed: 0.327924
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.401194
Iter 8/10: OSS cache speed: 0.428318
Iter 8/10: ladvise speed: 0.373658
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.388951
Iter 9/10: OSS cache speed: 0.392432
Iter 9/10: ladvise speed: 0.359207
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.311286
Iter 10/10: OSS cache speed: 0.37639
Iter 10/10: ladvise speed: 0.35035
Average uncached read: .47
Average speedup with OSS cached read:  .48 = +2%
Average speedup with ladvise willread:  .44 = +-6%
Speedup with OSS cached read less than 20%,  got 2%. Skipping ladvise willread check.
fail_loc=0